DOI: 10.1073/pnas.1905232116
论文题名: Global trends toward urban street-network sprawl
作者: Barrington-Leigh C. ; Millard-Ball A.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期: 4 起始页码: 1941
结束页码: 1950
语种: 英语
英文关键词: Climate change policy
; Transportation
; Urban development
; Urban sprawl
Scopus关键词: article
; city
; climate change
; theoretical study
; time series analysis
; urbanization
英文摘要: We present a global time series of street-network sprawl-that is, sprawl as measured through the local connectivity of the street network. Using high-resolution data from OpenStreetMap and a satellite-derived time series of urbanization, we compute and validate changes over time in multidimensional street connectivity measures based on graph-theoretic and geographic concepts. We report on global, national, and city-level trends since 1975 in the street-network disconnectedness index (SNDi), based on every mapped node and edge in the world. Streets in new developments in 90% of the 134 most populous countries have become less connected since 1975, while just 29% show an improving trend since 2000. The same period saw a near doubling in the relative frequency of a street-network type characterized by high circuity, typical of gated communities. We identify persistence in street-network sprawl, indicative of path-dependent processes. Specifically, cities and countries with low connectivity in recent years also had relatively low preexisting connectivity in our earliest time period. We discuss implications for policy intervention in road building in new and expanding cities as a top priority for sustainable urban development. © 2020 National Academy of Sciences. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164345
Appears in Collections: 气候变化与战略
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作者单位: Barrington-Leigh, C., Institute for Health and Social Policy, McGill University, Montreal, QC H3A1A3, Canada, McGill School of Environment, McGill University, Montreal, QC H3A2A7, Canada; Millard-Ball, A., Environmental Studies Department, University of California, Santa Cruz, CA 95064, United States
Recommended Citation:
Barrington-Leigh C.,Millard-Ball A.. Global trends toward urban street-network sprawl[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(4)